Smicridea ( Rhyacophylax ) boraceia, Santana & Desiderio & Hamada, 2021

Smicridea ( Rhyacophylax) boraceia sp. nov. Santana, Desiderio & Hamada

Figs. 1–3 View FIGURE 1 View FIGURE 2 View FIGURE 3

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Diagnosis. Smicridea ( Rhyacophylax) boraceia sp. nov. is most similar to S. ( Rhyacophylax) scalprum Vilarino, Dias & Calor 2019 by having tergum X concave at its apex in dorsal view, with lateral margins rounded forming a produced flap, strongly sclerotized, and with the apex of the phallotremal sclerite of the phallic apparatus with subtriangular lateral flap. However, S. ( R.) boraceia sp. nov. has six short, stout spines on the ventral region of the apicomesal lobe of tergum X, which are absent in S. ( R.) scalprum . In addition, S. ( R.) boraceia sp. nov. can be recognized by the two medium-sized, apicolateral spines directed posterad and generally three apicoventral spines directed downward on the phallic apparatus (both absent in S. ( R.) scalprum ). Additionally, the new species has a pair of subapical, comma-shaped sclerites on the phallotremal sclerite of the phallic apparatus, in dorsal view.

Description. Adult male. Length of each forewing 7.95–8.16 mm (mean = 8.05, SD = ±0.27, n = 5). General color dark brown (in alcohol) ( Fig. 1A View FIGURE 1 ). Antennae pale brown ( Figs 1 View FIGURE 1 A–1C). Head dark brown, dorsal region with: brown setae ( Fig. 1C View FIGURE 1 ); well-pronounced coronal suture; five setal warts, with anteromesal wart small, rounded, anterolateral pair partially divided, weakly delimited, and posterolateral pair large, ovoid ( Fig. 1C View FIGURE 1 ). Width of one eye, in dorsal view, 1/3 that of interocular distance ( Fig. 1C View FIGURE 1 ). Maxillary palp with segment 3 about 2X longer than either of segments 1 or 2 and about same length as segment 4, segment 5 about 1.2X as long as all previous segments combined ( Fig. 1B View FIGURE 1 ). Thorax dark brown, covered with brown setae ( Fig. 1A View FIGURE 1 ); legs brown, with fore- and mid-leg tarsi yellowish ( Fig. 1A View FIGURE 1 ). Wing venation typical for subgenus ( Figs 1D, 1E View FIGURE 1 ). Forewings, in alcohol, dark brown, with three white transverse bands zigzaging over full length, one subapical band arising on costa, running through half length of R2 and ending at Cu1b; mesal band arising on costa, running through base of R2+3 and ending on apex of Cu2, and basal band arising on subcosta and reaching anal vein ( Fig. 1D View FIGURE 1 ). Sternum V with pair of anterolateral glandular processes 1.2X longer than sternum. Abdominal segments VI and VII without internal glands ( Fig. 1F View FIGURE 1 ).

Male genitalia. Segment IX in lateral view with anterolateral margins sinuous, concave at mid-height, weakly sclerotized ( Fig. 2A View FIGURE 2 ); posterodorsal margins produced, rounded, bearing small spicules ( Figs 2A, B View FIGURE 2 ). Tergum X elongate; in lateral view, ventrolateral margins strongly sclerotized, without processes; each with apex ending in rounded lobe, with shallow subapicoventral notch, ( Fig. 2A View FIGURE 2 ); in dorsal view, lateral margins rounded, each produced as flap; dorsomesal setose area bearing seven to eight pairs of medium-sized, fine setae; apex divided mesally into pair of hemitergites by parallel-sided incision about 1/2 length of tergite ( Fig. 2B View FIGURE 2 ); apex of each hemitergite concave, with one pair of short, stout apicolateral spines, apicomesal lobe strong, rounded, bearing about six short, stout spines ventrally ( Figs 2B, 2C View FIGURE 2 ). Inferior appendages each 2-segmented; basal segment as long as tergum X, slightly inflated distally, covered with medium-sized to long, fine setae, with four long, stout spine-like setae subapically, two dorsal and two on internal margin; apical segment about 1/2 as long as basal segment, thick, covered with medium-sized, fine setae, curved mesad, apex slightly pointed ( Fig. 2B View FIGURE 2 ). Phallic apparatus long and tubular; basal section, in lateral view, enlarged, 3X diameter of phallotheca at its narrowest portion, forming angle of about 63° with apical section; median section of phallotheca strongly curved ventrad, without processes ( Fig. 2D View FIGURE 2 ); apex, in dorsal view, slightly enlarged, without processes or plates; endothecal membranes, in dorsal view, with two medium-sized, dorsolateral spines, directed posterad ( Fig. 2F View FIGURE 2 ); in lateral view, with three medium-sized, apicoventral spines directed downward ( Fig. 2E View FIGURE 2 ) ( variation: male paratype INPA-TRI 000100 has only two spines ( Fig. 2G View FIGURE 2 ); male paratype INPA-TRI 000101 also has two spines, one them minute in size ( Fig. 2H View FIGURE 2 )); phallotremal sclerite, in dorsal view, distinct, strongly sclerotized, slightly divided distally into two slender, paired lobes with rounded apices, each lobe bearing one small subtriangular lateral, flap ( Fig. 2F View FIGURE 2 ), accompanied basally with pair of very dark, subapical, comma-shaped sclerites; in lateral view, slender, slightly upturned apically ( Fig. 2D View FIGURE 2 ). Ejaculatory duct of endophallus, in lateral view, distinct, sclerotized. Endothecal membranes distinctly reticulated ( Fig. 2E View FIGURE 2 ), dorsolateral spines upturned when phallic apparatus everted ( Fig. 2H View FIGURE 2 ).

Female and immature stages. Unknown.

Material examined. Holotype male. BRAZIL: São Paulo: Salesópolis, Estaç „o Biológica de Boracéia , Casa Grande , 15.xi.1974, C.G. Froehlich leg., ( MZUSP 000351 View Materials ).

Paratypes: same data as holotype, 15 males ( MZUSP) ; same data, except Rio Claro , represa Casa Grande, 23º38’10.3”S, 45º49’57.1”W, 856 m a.s.l., 5 males, 23.i.2011 GoogleMaps , L.L. Dumas & D.M. Takiya legs., (INPA-TRI 000100–104); same data, except 10 males ( DZRJ) GoogleMaps ; same data, except 4 males ( DZUP) GoogleMaps .

Distribution. BRAZIL (Atlantic Forest: S„o Paulo state) ( Fig. 3 View FIGURE 3 ).

Etymology. The specific epithet refers to Estaç„o Biológica de Boracéia where the specimens were collected. The name is a substantive in apposition, with unchanging gender.